Revolving pliers.



PATBNTBD MAY 7 K. WEISS. REVOLVING PLIERS.

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PATBNTED MAY 7, 1907.

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KARL WEISS, OF WATERBURY, CONNECTICUT REVOLVING PLIERS.

Specification of Letters Patent.

Patented May '7, 1907.

Application filed October 3, 1906.1 Serial No. 337,265.

To all whom, it may concern:

Be it known that I, KARL Wniss, a citizen of the United States,residingl at Waterbury, in the county of New I-Iaven and State ofConnecticut, have invented a new and useful Improvement in RevolvingPliers, of which the followingis a specification. i

This invention relates to pliers especially adapted for wire workers andthe object of the invention is a set of pliers, the jaws of which can berotated independent of a rotary movement of the handles, so that intwisting wires it is not necessary to release the grip each half turn inorder to take a new grip and continue the twisting step by step. Thepliers are also useful in working in corners or other places whereitwill be diflicult to manipulate the ordinary pliers as the jaws can beoperated by the handle levers in any position.

The invention consists of a pair of movable gripping jaws provided withcutters and turning upon a common pivot pin, of a movable cam blockadapted to be forced in a straight line between the inner ends of thejaws which are divergent and provided with rollers and a pair of handlelevers rotatable with respect to the jaws and cam block, to-

gether with suitable means for inclosing the cam block and holding theparts in their assembled position.

In the accompanying drawings-Figure 1 is a side elevation of the pliers,the jaws being shown open; Fig. 2 is a plan view of the pliers; Fig. 3is a section on the line of Fig. 2, the aws being shown in open positionFig. 4 is a section on the line 4 4 of Fig. 3; Fig. 5 is a section ontheline -oc of Fig. 2, the jaws being shown in closed position 5 Fig. 6 isa section on the line 6-6 of Fig. 3; Fig. 7 is a section on the line 7-7of Fig. 3 Fig. 8 is a detail perspective view of one of the jaws; Fig. 9is a perspective view of the cam block; Fig. l0 is a perspective view ofa sleeve rotating upon the cam block when in position; Fig. 11 is adetail perspective View of the inner end of one of the handle leversFig. 12 is a detail perspective view of one section of a casing; Fig. 13is a perspective view of a flanged collar.

The pliers comprise the following essential parts namely a pair ofco-operating jaws A, a cylindrical casing B split diametrically andserving as a holder for the jaws and also as a casing or housing for amovable cam block C.

A sleeve D is rotatably held upon the cam block C and within the casingB and is adapted for rotation relative to rotation of the casing, jawsor cam block. Operating lever handles E adapted to engage and operatethe cam block are held in their proper position by means of a lnurledand fianged collar F. The above are the essential features of the deviceand their construction will be described in detail.

Each jaw A is provided with a bifurcated portion A adjacent its rear endin which portion is arranged a pin A2 and .this pin pro- J, which formsa common pivot pin for both of the jaws. The bolt J is held in positionby an ordinary nut J. To further aid in holding the jaws in position andalso to hold them normally open, springs II are connected at one end tothe pivot pin A2 of one of the jaws and at the opposite end to the pivotpin A2 of the other jaw. The casing B is split diametrically in order tofacilitate the assembling of the parts mentioned and each section isprovided with a circumferential interior shoulder B2 which terminatesshort of the edges of the sectionl so that when the two sections areplaced together they form a cylinder provided with opposing shoulders onopposite sides of the cylinder, the ends of which are spaced apart. Thecam block C consists of a disk C of less diameter than the casing B andwhich carries upon its front face the cam block proper. This cam blockhas its forward end V-shaped, thereby forming two oppositely inclinedcam faces C2, which faces are adapted to engage respectively the camfaces A3 of the jaws A. The cam block C also carries two outwardly andoppositely arranged shoulders C3, which fit in the spaces between theends of the shoulders B2, thereby preventing rotation of the cam blockWithin the casing B and independent of rotation of the casing. The camblock C I preferably core out, as shown in the drawing, in order toreduce as much as pos- IOO IIO

sible the weight of the pliers. A smooth cylindrical sleeve D litswithin the casing B and bears against the rear faces of the shouldersB2. The sleeve D has two oppositely arranged lugs D whichprojectrearwardly from the-casing B when the sleeve D is in position. Itmay also be noted that the sleeve D fits in the casing B between thecasing and the disk C of the cam block and rotates upon said disk. Eachhandle lever E is provided at its inner end with a flat curved cam E,which cam carries a laterally extending pin E2 roj ecting upon bothsides of the cam and w ich serves as a movable pivot upon which thelevers work. The collar F is provided with a retaining flange F at itsrear end and is l. threaded upon the rear end portion of the sleeve B.The cams E of the handle levers E rest loosely within the collar F andbetween the lugs D/ of the rotatable sleeve D and bear upon the rearface of the disk C. The pivot pins E2 bear upon the flange F of thecollar F when the jaws are in a closed position. Suitable cutting bladesK are carried by one side of the jaws A.

From the above description it is thought that the operation of thepliers will be obvious. The handles E rotate loosely in the sleeve F andare held in the proper position by means of the lugs D of the sleeve Dand this sleeve rotates freely within the casing B. When the handles Eare pressed together the cams E engage the smooth fiat rear face of thedisk C', forcing the same forwardly, and the cam block C slidesforwardly between the shoulders B2 and the cam faces C2 engage the camfaces A3 and force the rear ends of the jaws A apart, thus bringing theouter ends of the jaws together. It will be obvious as there is nopositive connection between the cams E and the disk C the jaws will beoperated no matter what position is assumed by the handle relative tothe aws and the jaws may be operated during rotation of either the jawsor the handle as well as while the parts are stationary.

It will be obvious that while the main object of the invention is tomake the jaws rotatable with respect to the handle, the handle can alsobe rotated without imparting rotation to the jaws in case it isdesirable to shift the position of the handles in'order to get a bettergrip.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is- 1. A device of the kind describedcomprising a pair of gripping jaws, and a pair of operating handlesadapted to operate said jaws, and means for rotating the jawsindependent of movement of the handles.

2. A revolving plier comprising two gripping jaws, two operatinghandles', and means for rotatably connecting the said jaws to the saidhandles.

3. A device of the kind described comprising two gripping jaws havingrear cam faces, a casing to which said jaws are connected, a cam blockslidably held in said casing and adapted to engage the cam faces of thejaws, handles having cam portions adapted to loosely engage the camblock, and a flanged collar loosely connecting said handles to a casing,the jaws, cam block and casing being rotatable relative to the handle.

4. A device of the kind described, a pair of gripping jaws havingdivergent cam faces, a casing supporting said jaws,l a V-shaped camblock slidably held in said casing and adapted to engage the jaws, saidcam block being provided with a rear disk portion, a flanged collarcarried by the casing and operating handles having their inner endsprovidedl with cams, said handles being loosely held within the collarand the cam ends of the handles loosely engaging the disk of the camblock, as and for the purpose set forth.

5. A plier comprising two jaws working upon a common pivot point andprovided with divergent rearwardly extending cam faces, a casingsupporting and partially vinclosing said jaws, a cam block loosely heldin said casing and adapted to be brought into engagement with the camfaces of the jaws, means for preventing rotation of the cam blockindependent of rotation of the casing, operating handles having innercam ends in loose engagement withthe rear face of the cam block andadapted to force the same 6. A device of the kind described comprisingspring opened gripping jaws, a casing to which said jaws are attached, acam slidably IOO held in said casing, a sleeve rotatably held in thecasing and having rearwardly projecting lugs, a flanged retaining collarcarried by the rear of the casing and operative handles having cam endsand integral pivot pins loosely held within said retaining collar, thecam ends being loosely held between the lugs of the sleeve and a looseengagement with the rear face of the cam operating upon the jaws, as andfor the purpose set forth.

7. Pliers of the kind described, comprising a casing having forwardlyextending ears, a bolt fastened through said ears, gripping jaws havingoppositely inclined rear cam faces and bearings formed adjacent said camfaces, the bearings engaging said bolt, the rear end portions of saidjaws being bifurcated, pins fastened to the bifurcations and extendingupon opposite sides of said jaws, rollers mounted upon said pins withinthe bifurcation, springs connecting the ends of pins of oppositerollers, a cam movably held within the casing and adapted to engage thecam faces ofthe jaws and the rollers, operating handle levers forforcing said cam for- IIO ISO

ward, and means for loosely holding said handle levers in position,thereby permitting rotation of the jaws, casing, and cam independent ofmovement of the handle.

8; A device of the kind described comprising movable jaws, rollerscarried at the inner ends of said jaws, springs adapted to spread theouter ends of the jaws, a casing supporting said aws, a cam blockcomprising a V shaped cam portion adapted to engage said rollers and adisk portion, said cam block being loosely held in the casing, means forpreventing rotation of the cam block within the casing, a sleeverotatably mounted upon the disk portion of the cam and within the casingand having rearwardlyextending lugs, and operating handles having camportions loosely held between said lugs and loosely in engagement withthe disk of the cam block, as and Jfor the purpose set forth.

9. A device or' the kind described comprising a pair ofoperating camlever handles, a casing, gripping jaws carried by said easing, a camblock loosely held in the casing adapted to force the gripping jawstogether, the camportions of the lever handles actuating said cam block,and means for loosely connecting said handles to the casing, therebypermitting rotation of the casing independent of movement of thehandles.

KARL WEISS.

Witnesses:

HENRY L. RowLAND, JOHN EICHMAN.

